<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>欢迎页面</title>
    <style>
        html {
            height: 100%;
        }
        body{
            background-image: url("../image/bg.jpg");
            background-position: center;
            background-size: cover;
        }
    </style>
</head>
<body>

</body>
</html>